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Rating depth structure for rainbow trout.
Shared by DepthScout anglers. Exact spots stay private, always.
400-acre lake near Blaine. The lake tops out around 49 ft. Bathymetry on this water is estimated from its real outline and maximum depth. Use it to shortlist water, then verify with your electronics — and never navigate by it. What the data behind the map says about each species, season by season:
The outline encloses 412 acres, worked by 4.7 miles of shoreline. A middling shoreline index (1.6) gives it some bays to work without being a maze. Littoral water — the productive band under ~15 ft — makes up 54% of this chart, as modeled. End to end it runs roughly 1.5 mi, about 0.6 mi across. Blaine County claims this one. If the bite dies, Yellow Belly Lake is 1 mi to the north.
Come spring, look for rainbow trout tight to the bank in 5 to 20 ft. They move out to 8 to 30 ft in summer and finish the year down in 8 to 40 ft. If you only fish one area, make it Old creek channel: a creek channel around 25 ft that scores prime in summer. Best bite is early morning and the evening. A dodger + spoon (deep troll) or a flutter spoon is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Main-lake point (12 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Old creek channel (25 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Main-lake point (12 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Break off the point (22 ft) | Jigging spoon, Tube jig (white) |
When the water first warms, kokanee slide up into 10 to 30 ft. Summer is a 15 to 49 ft game here, winter a 12 to 49 ft one. Start at Deep basin. It's a deep basin holding about 42 ft of water and rates prime come summer. The feeding windows run early morning. Keep a dodger + pink/orange squid on downrigger or a kokanee bug + corn rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 30 ft | dawn | Break off the point (22 ft) | Small dodger + squid (pink), Wedding-ring spinner + corn |
| Summer | 15 to 49 ft | dawn | Deep basin (42 ft) | Dodger + pink/orange squid on downrigger, Kokanee bug + corn |
| Fall | 5 to 40 ft | dawn | Deep basin (42 ft) | Dodger + squid (deeper red/purple), Small spoon |
| Winter | 12 to 49 ft | dawn | Deep basin (42 ft) | Small glow jig + corn or maggot, Tiny spoon |
Structure-wise the chart holds 7 features, led in depth by Deep basin at roughly 42 ft.
Season dates, license requirements, and size and bag limits for Idaho waters are set by the Idaho Fish and Game — and special regulations can apply to Pettit Lake specifically, so confirm the current rules before you fish.
Check the official Idaho fishing regulations →
Pettit Lake is about 49 ft (15 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target rainbow trout, kokanee on Pettit Lake.
Deep basin is the top-rated area: a deep basin in about 42 ft of water that rates prime for kokanee in summer. The interactive chart above rates every spot for each species and season.
For rainbow trout, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Pettit Lake is regulated by the Idaho Fish and Game. Check the official Idaho regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Yellow Belly Lake 1 mi · Perkins Lake 4 mi · Toxaway Lake 5 mi · Bull Trout Lake 29 mi · Salmon River (Upper) 30 mi · Cape Horn Lake #1 32 mi · Deadwood Reservoir 45 mi · Anderson Ranch Reservoir 46 mi · Magic Reservoir 53 mi · Arrowrock Reservoir 54 mi · Lucky Peak Lake 62 mi · Carey Lake 66 mi
See how Pettit Lake stacks up: best rainbow trout lakes in Idaho · best kokanee lakes in Idaho
Browse all Idaho fishing maps or see every water on DepthScout. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.